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> LM2577 step-up 3A integrated switching regulator ic (3)
LM2577 step-up 3A integrated switching regulator ic (3)
Qty:3 UCC2577 -T-ADJ 5 pin TO220
54KHz operation - Hi efficiency
Requires few external components
NPN output switches 3.0A, can stand off 65V
Wide input voltage range: 3.5V to 40V
Current-mode operation for improved transient response, line regulation, and current limit
Soft-start function reduces in-rush current during start-up
Output switch protected by current limit, under-voltage lockout, and thermal shutdown
The UCC2577/LM2577 are monolithic integrated circuits that provide all of the power and control functions for step-up (boost), flyback, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.
Requiring a minimum number of external components, these regulators are cost effective, and simple to use. Listed in this data sheet are a family of standard inductors and flyback transformers designed to work with these switching regulators.
Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.
US: $3.75 Canada: $4.50 International: $5.50 Lowest cost option.
2-nd item: S&H 75% less than first (or 25% of first)
item nr 3-5: S&H 80% less than first (or 20% of first)
item nr 6-10: S&H 90% less than first (or 10% of first)
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photo may show different part number. Device may have offset pins.
